Sapphire Windows - Custom & Stock Optical Sapphire Windows

UQG Sapphire windows are manufactured in a random or specified orientation. Our Sapphire windows are extremely hard and scratch resistant useful for their (UV) ultraviolet, (VIS) visible and (IR) infrared transmission. The material has excellent thermal conduction and heat radiation, being resistant to common chemical acids and alkaline. Manufactured in a range of sizes and thicknesses it can withstand high pressures and suited for many applications when used as a window in harsh environments. We supply small and production batches accommodating most optical and commercial finishes.

UQG custom made Sapphire windows are manufactured in a random or specified orientation. Our Sapphire windows are extremely hard and scratch resistant useful for their (UV) ultraviolet, (VIS) visible and (IR) infrared transmission.

The material has excellent thermal conduction and heat radiation, being resistant to common chemical acids and alkaline. Manufactured in a range of sizes and thicknesses it can withstand high pressures and suited for many applications when used as a window in harsh environments.

We supply small and production batches accommodating most optical and commercial finishes.

Specifications Sapphire

Diameter:

+0.00/-0.10mm

Surfaces:

60/40

Thickness:

± 0.10mm

Flatness:

≤ 5 Fringes

Edges:

Fine Ground

Parallelism:

≤ 3 Arc mins

Custom Sizes & Options

Diameters:

2.50mm to 230mm

Squares/Rectangles:

1mm to 210mm

Thickness:

0.12 to 150mm

Surfaces:

80/50 to 60/40

Edges:

Ground or polished

Diameter/Thickness:

Tol. up to 0.05mm

Parallelism:

Up to 1 minute

Flatness:

Up to 2 Lambda per Ø25mm

Orientation:

Up to ± 2°

Please send us your requirements or for further information please contact us.

SAPPHIRE

OPTICAL PROPERTIES

Transmission Range

0.17 to 5.5 microns

Refractive Index (table below)

1.75449 (o) 1.74663 (e) at 1.06 microns

Reflection Loss

14% at 1.06 microns (2 surfaces)

Absorption Coefficient

0.3 x 10-3 cm-1 at 2.4µm

Reststrahlen Peak

13.5µm

dN/dT

13.7 x 10-6 at 5.4µm

dN/dµ = 0

1.5µm

PHYSICAL PROPERTIES

Density

3.97 gm/cc

Melting Point

2040°C

Thermal Conductivity

27.21 Wm-1K-1 at 300K

Thermal Expansion

5.6 (para) & 5.0 (perp) x 10-6/K *

Hardness

Knoop 2000 with 2000g indenter

Specific Heat Capacity

419 J Kgm-1K-1

Dielectric Constant

11.5 (para) 9.4 (perp) at 1MHz

Youngs Modulus (E)

335 GPa

Shear Modulus (G)

148.1 GPa

Bulk Modulus (K)

240 GPa

Elastic Coefficients

C11=496 C12=164 C13=115 C33=498 C44=148

Apparent Elastic Limit

300 MPa (45,000 psi)

Poisson Ratio

0.25

CHEMICAL PROPERTIES

Solubility

98 x 10-6 g/100g water

Molecular Weight

101.96

Class/Structure

Trigonal (hex), R3c

µm

No

Ne

µm

No

Ne

µm

No

Ne

0.193

1.92879

1.91743

0.442

1.78038

1.77206

1.064

1.75449

1.74663

0.213

1.88903

1.87839

0.458

1.77843

1.77015

1.320

1.75009

1.74227

0.222

1.8754

1.86504

0.488

1.7753

1.76711

2.703

1.719

1.711

0.226

1.87017

1.85991

0.515

1.77304

1.76486

2.941

1.712

1.704

0.244

1.85059

1.84075

0.532

1.7717

1.76355

3.333

1.701

1.693

0.248

1.84696

1.83719

0.694

1.76341

1.75542

3.704

1.687

1.679

0.257

1.83932

1.82972

0.755

1.76141

1.75346

4.000

1.674

1.666

0.266

1.83304

1.82358

0.780

1.76068

1.75274

4.348

1.658

1.65

0.337

1.80082

1.79206

0.800

1.76013

1.7522

4.762

1.636

1.628

0.351

1.79693

1.78825

0.820

1.75961

1.75168

5.000

1.623

1.615

0.355

1.79598

1.78732

0.980

1.75607

1.74819

WHILE EVERY ATTEMPT HAS BEEN MADE TO VERIFY THE SOURCE OF THE INFORMATION, NO RESPONSIBILITY IS ACCEPTED FOR ACCURACY OF DATA.